LTC4217
2A Integrated Hot
Swap Controller
Fea T Descrip T
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Small Footprint The LTC 4217 is an integrated solution for Hot Swap
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33m MOSFET with R applications that allows a board to be safely inserted and
SENSE
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Wide Operating Voltage Range: 2.9V to 26.5V removed from a live backplane. The part integrates a Hot
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Adjustable, 5% Accurate Current Limit Swap controller, power MOSFET and current sense resistor
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Current and Temperature Monitor Outputs in a single package for small form factor applications. A
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Overtemperature Protection dedicated 12V version (LTC4217-12) contains preset 12V
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Adjustable Current Limit Timer Before Fault specific thresholds, while the standard LTC4217 allows
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Power Good and Fault Outputs adjustable thresholds.
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Adjustable Inrush Current Control
The LTC4217 provides separate inrush current control and a
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2% Accurate Undervoltage and Overvoltage Protection
5% accurate 2A current limit with foldback current limiting.
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Pin Compatible with LTC4232 (DFN Package Only)
The current limit threshold can be adjusted dynamically
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Available in 20-Lead TSSOP and 16-Lead
using an external pin. Additional features include a current
5mm 3mm DFN Packages
monitor output that amplifies the sense resistor voltage
for ground referenced current sensing and a MOSFET
temperature monitor output. Thermal limit, overvoltage,
a T
undervoltage and power good monitoring are also provided.
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RAID Systems, Solid State Drives For a 5A pin compatible version, see LTC4232.
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Server I/O Cards L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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Industrial
Typical a T
12V, 1.5A Card Resident Application with Auto-Retry Power-Up Waveforms
V
OUT
V OUT
12V
DD
12V
+
CONTACT
* V
IN
1.5A
UV 330F
BOUNCE
10V/DIV
10k
AUTO
LTC4217DHC-12
I
IN
RETRY
0.1A/DIV
PG
FLT
GATE
TIMER
I V
SET OUT
10V/DIV
INTV I ADC
CC MON
GND
P
1F 20k
G
10V/DIV
4217 TA01a
4217 TA01b
25ms/DIV
* TVS: DIODES INC. SMAJ17A
4217fg
1
For more information www.linear.com/LTC4217
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ion uresLTC4217
a Te Maxi Mu M r a T
(Notes 1, 2)
Supply Voltage (V ) ................................. 0.3V to 28V Operating Ambient Temperature Range
DD
Input Voltages LTC4217C ................................................ 0C to 70C
FB, OV, UV ..............................................0.3V to 12V LTC4217I .............................................40C to 85C
TIMER ................................................... 0.3V to 3.5V LTC4217H .......................................... 40C to 125C
SENSE .............................V 10V or 0.3V to V Junction Temperature (Notes 4, 5) ........................ 125C
DD DD
Output Voltages Storage Temperature Range .................. 65C to 150C
I , I ................................................. 0.3V to 3V Lead Temperature (Soldering, 10 sec)
SET MON
PG, FLT .................................................. 0.3V to 35V FE Package Only ...............................................300C
OUT ............................................ 0.3V to V + 0.3V
DD
INTV .................................................. 0.3V to 3.5V
CC
GATE (Note 3) ........................................ 0.3V to 33V
p in c F T
LTC4217 LTC4217
LTC4217-12
TOP VIEW
TOP VIEW
SENSE 1 20 SENSE
V 2 19 V
V 1 16 V
DD DD
DD DD
UV 3 18 I
UV 2 15 I
SET
SET
OV 4 17 I
OV 3 14 I
MON
MON
TIMER 5 16 FB
TIMER 4 13 FB
21
17
INTV 6 15 FLT
INTV 5 12 FLT SENSE
CC SENSE CC
GND 7 14 PG
GND 6 11 PG
OUT 8 13 GATE
OUT 7 10 GATE
OUT 9 12 OUT
OUT 8 9 OUT
SENSE 10 11 SENSE
DHC PACKAGE
16-LEAD (5mm 3mm) PLASTIC DFN
FE PACKAGE
T = 125C, = 43C/W
JMAX JA
20-LEAD PLASTIC TSSOP
EXPOSED PAD (PIN 17) IS SENSE,
T = 125C, = 38C/W
JMAX JA
= 43C/W SOLDERED, OTHERWISE = 140C/W
JA JA
EXPOSED PAD (PIN 21) IS SENSE,
= 38C/W SOLDERED, OTHERWISE = 130C/W
JA JA
4217fg
2
For more information www.linear.com/LTC4217
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